21000657670

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2663}}^1\times {\mathrm{25439}}^1$

素因数の和:28140

約数の個数: 32

約数和(自身を含む): 39036764160

約数和(自身を除く): 18036106490

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 2663, 5326, 13315, 25439, 26630, 50878, 82553, 127195, 165106, 254390, 412765, 788609, 825530, 1577218, 3943045, 7886090, 67744057, 135488114, 338720285, 677440570, 2100065767, 4200131534, 10500328835, 21000657670]

約数ペア:

[(1, 21000657670), (2, 10500328835), (5, 4200131534), (10, 2100065767), (31, 677440570), (62, 338720285), (155, 135488114), (310, 67744057), (2663, 7886090), (5326, 3943045), (13315, 1577218), (25439, 825530), (26630, 788609), (50878, 412765), (82553, 254390), (127195, 165106)]